Are longer intake runners better for volumetric efficiency?
12-11-2011, 05:03 AM
#1
Are longer intake runners better for volumetric efficiency? Was just looking at the LSX intake design and I understand that the LSX intake ports on the heads are taller but I was just curious if longer runners improve VE or not on the LT1 heads?
Didn't Edelbrock make an LT1 intake manifold that had longer runners similar to the LSX design? And I'm not talking about the "air gap" manifold. Someone made an LT1 intake with longer runners similiar to this one years back.
Didn't Edelbrock make an LT1 intake manifold that had longer runners similar to the LSX design? And I'm not talking about the "air gap" manifold. Someone made an LT1 intake with longer runners similiar to this one years back.
Last edited by Rob94hawk; 12-11-2011 at 05:24 AM.
12-11-2011, 08:26 AM
#4
That stealth ram looks very similar to an lt1 intake.
Another thing to consider is tpi intake manifolds. Alot of the tpi guys want Lt1 intake manifolds. Unless your building some radically insane engine, I dont think theres anything wrong with the lt1 manifold. When ported and matched to heads and a good throttle body, they put down very impressive results. Im not sure what your looking for out of an intake with longer runners, but if you want an lsx intake, buy an lsx engine
I guess i didnt answer the VE question though.
Last edited by trilkb; 12-11-2011 at 08:37 AM.
12-11-2011, 11:21 AM
#6
What Edelbrock made was a bad joke meant to separate the blind faithful from their money.
I believe there are a few Accel "TPI" converted LT1 manifolds around Lingenfelter used them on some Impalas.
Back when the LT1 was fairly new Lingenfelter and Edelbrock both admitted defeat on a improved LT1 intake that would fit easily, it is not perfect, and from a bench racing perspective is not good atall, but in the real world works pretty well. I believe there is even a quote from Lingenfelter about how it should not work but it does.
I believe there are a few Accel "TPI" converted LT1 manifolds around Lingenfelter used them on some Impalas.
Back when the LT1 was fairly new Lingenfelter and Edelbrock both admitted defeat on a improved LT1 intake that would fit easily, it is not perfect, and from a bench racing perspective is not good atall, but in the real world works pretty well. I believe there is even a quote from Lingenfelter about how it should not work but it does.
12-11-2011, 11:43 AM
#7
Launching!
Join Date: Jul 2004
Location: Florence, MS
Posts: 249
Likes: 0
Received 0 Likes
on
0 Posts
Trending Topics
12-11-2011, 12:09 PM
#9
TECH Fanatic
iTrader: (3)
Join Date: Jan 2008
Location: Corpus Christi Texas
Posts: 1,519
Likes: 0
Received 0 Likes
on
0 Posts
What about the tpis mini ram
http://www.tpis.com/parts/view/36
http://www.tpis.com/parts/view/36
THIS. TPI intake on a 350 CANNOT breath past 5200rpm. IIRC it had nearly 12" intake runners. Miniram was around 3.5-4. HSR was the middle man at 7-8" runners. Cannot recall the LT1/4 but it was in between the miniram and HSR
12-11-2011, 01:34 PM
#10
Resident Racing Jerk
iTrader: (1)
Join Date: Dec 2002
Location: sc
Posts: 647
Likes: 0
Received 0 Likes
on
0 Posts
longer length runners will require more cross section area. the tpi intakes produced a 17-19" runner from the plenum to the back of the valve. (i think thats right?) cross section on the runners was somewhat small, though.
